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   comp.lang.fortran      Putting John Backus on a giant pedestal      5,127 messages   

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   Message 4,549 of 5,127   
   gah4 to All   
   Re: Eigen stuff   
   27 Nov 23 03:23:26   
   
   From: gah@ugcs.caltech.edu   
      
   On 11/18/23 7:29 AM, db wrote:   
   > I don't find an ng on numerical computation, and I use   
   > Fortran, so I ask here: what is a good routine for   
   > computing eigenvalues and -vectors? I have an old   
   > version of RGG but am not happy with it. Is there   
   > something better?   
      
   > I anticipate the question, why am I unhappy with RGG?   
   > Among other things, it's an old f77 routine.   
      
   It is nice to have old routines updated to accept   
   assumed shape arrays.  Often enough, the underlying   
   algorithms haven't changed.   
      
   Sometimes it is done with a wrapper, that then calls   
   the old routine.  Or one can rewrite the first lines,   
   to give the right values to variables, and then into   
   the original code.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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